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Layer-by-layer thinning of MoS₂ by thermal annealing
Xin Lu1, Muhammad Iqbal Bakti Utama, Jun Zhang
1Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371. Qihua@ntu.edu.sg.
Nanoscale
|August 8, 2013
Abstract:
By thermal annealing, few-layer MoS₂ flakes can be thinned down. In one hour, the upper layer is peeled off due to sublimation. Eventually, monolayer MoS₂ is achieved. We have characterized the process by optical contrast, Raman spectroscopy and atomic force microscopy (AFM), and observed a mixture of surfaces of N and N- 1 layers.
